Frequencies for first 10,000 rows of vin_3 variable in vehicle dataset :

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         42        0.42        0.42
          1 |      1,041       10.41       10.83
          2 |        627        6.27       17.10
          3 |        562        5.62       22.72
          4 |        858        8.58       31.30
          5 |         32        0.32       31.62
          6 |        207        2.07       33.69
          7 |        244        2.44       36.13
          8 |        252        2.52       38.65
          9 |        353        3.53       42.18
          A |        840        8.40       50.58
          B |        214        2.14       52.72
          C |        488        4.88       57.60
          D |        429        4.29       61.89
          E |        176        1.76       63.65
          F |         60        0.60       64.25
          G |        410        4.10       68.35
          H |        109        1.09       69.44
          J |         33        0.33       69.77
          K |        290        2.90       72.67
          L |         70        0.70       73.37
          M |        599        5.99       79.36
          N |        443        4.43       83.79
          P |        122        1.22       85.01
          R |         19        0.19       85.20
          S |         71        0.71       85.91
          T |        776        7.76       93.67
          U |        265        2.65       96.32
          V |         75        0.75       97.07
          W |        108        1.08       98.15
          X |        120        1.20       99.35
          Y |         28        0.28       99.63
          Z |         37        0.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016